Fission studies with 140 MeVαparticles

Abstract

Binary fission induced by 140 MeV α-particles has been measured for nat Ag, 139 La, 165 Ho and 197 Au targets. The measured quantities are the total kinetic energies, fragment masses, and fission cross sections. The results are compared with other data and systematics. A minimum of the fission probability in the vicinity Z 2 /A = 24 is observed.

Investigation of 11B+197Au Reaction at Intermediate Energies

“…Analysis of the mass distribution curves made it possible to determine the positions of peak and the width of mass distributions. One can see in Table II, the value of the width at 137.5 MeV of the present work is in good agreement with data for α-induced fission of gold at 140 MeV of incident particle [6].…”

“…A considerable amount of measurements have been performed for proton-induced reactions on the gold target using various experimental methods and technique and predicted by theoretical models, were compiled and analyzed in the well known work of A. V. Prokofiev [5]. Experimental data for the light and heavy-ion-induced fission of gold are not rich enough and presented mainly by some works with 4 He and 12 C projectiles [6][7][8]. However, no literature data exists on the yield distribution of fission product, in the reaction of 11 B gold target neither at low nor at intermediate energy range.…”

COMPLETE AND INCOMPLETE FUSION COMPETITION IN 11B-INDUCED FISSION REACTIONS ON 197Au AT THE INTERMEDIATE ENERGY

“…For Au target the fissionability difference in the interaction with 11 B and its different breakup components as 4 He, 3 H, 7 Li nuclei is sufficiently. The fission cross sections for 197 Au by α-particles at energy 140 MeV [9] is equal about 100 mb, for 181 Ta this value at the same energy range is low also (∼ 10 mb) [10]. In reactions induced by 7 Li ions the cross sections do not expected large based on the data from 197 Au + 6 Li reactions [10].…”

“…In the study of fusion suppression for 9 Be + 144 Sm system [7] the authors have proposed the dependence of the incomplete fusion on the target charge through the more probable breakup process with increasing the target charge. It was expected also that at intermediate energy range the breakup probability is proportional to the gradient of the nuclear potential multiplied by an exponential factor depended of surface to surface separation.…”

“…For Au target the fissionability difference in the interaction with 11 B and its different breakup components as 4 He, 3 H,7 Li nuclei is sufficiently. The fission cross sections for 197 Au by α-particles at energy 140 MeV[9]…”